Plate 102 



Figs. 1-3, Microcystis aeruginosa Kiietz.; emend. Elenkin: 1, x 170; 

 2, X 1500; 3, X 940 



Microcystis aeruginosa Kuetz.; emend. Elenkin: unper- 

 f orated colony (M. flos-aquae), x 750 



Microcystis incerta Lemmermann, x 750 



Synechococctis aeruginosus Naegeli, x 940 



Gloeothece linearis Naegeli, x 750 



Merismopedia punctata Meyen, x 750 



[864] 



